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328
RESULTS

Media Type
328
texts
Availability
328
Always Available
Topics & Subjects
71
Geology
44
Geology, Stratigraphic
38
Petroleum
33
Mines and mineral resources
18
Coal
13
Limestone
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Collection
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Creator
17
busch, willis l
17
illinois state geological survey
11
bell, alfred hannam, 1895-
9
major, robert l
8
risser, hubert e
5
bradbury, james c
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Language
328
English
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